More details. What does the matrix have to do with it?
Is this 4096 2-dimensional integrals, each with data points from the
matrix? What?
Show us a tiny version of the problem. 8 times, with an 8x8 matrix, for
instance, with all the data and code shown explicitly. Then we'd know what
you're talking about.
Bobby
On Thu, 18 Jun 2009 03:48:34 -0500, Alexei Boulbitch
<Alexei.Boulbitch at iee.lu> wrote:
> Hello !
>
> I have an integral to perform 4096 times: it is a 3dimensionnal integral
> over a matrix of 4096.4096 points.
>
> It takes many hours and I still does not have the result. I made a loop
> with NIntegrate.
>
> Is it possible that an integration loop in mathematica takes so long ?
> Is there any ways to improve it ?
>
> Thank you
>
> Lena
>
> Hi, Lena,
> in general -yes. Think about replacing your loop by Table or Nest or
> comparable (depending of what precisely you are doing).
> It would be helpful, if you show your code. But do not do it in its
> original size, just do 10 times 10 by 10 or alike.
> Regards, Alexei
>
--
DrMajorBob at bigfoot.com